diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..adafe04
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,2 @@
+.github
+build
diff --git a/.github/releaser/release_cli.sh b/.github/releaser/release_cli.sh
new file mode 100644
index 0000000..1e31417
--- /dev/null
+++ b/.github/releaser/release_cli.sh
@@ -0,0 +1,44 @@
+#!/bin/bash
+
+# Set –e is used within the Bash to stop execution instantly as a query exits
+# while having a non-zero status.
+set -e
+
+ROOT_DIR="$(pwd)"
+VERSION="$(echo `git -C ${ROOT_DIR} describe --abbrev=0 --tags` | sed 's/^.//')" # "v1.2.3" -> "1.2.3"
+PACKAGE_NAME="ttrace_${VERSION}"
+
+
+# https://go.dev/doc/install/source#environment
+
+for OS_ARCH in \
+     "linux amd64" "linux arm64" \
+     "android arm64" \
+     "freebsd amd64" "freebsd arm" \
+     "darwin amd64" "darwin arm64" \
+     "windows 386" "windows amd64"; do
+
+    PAIR=($OS_ARCH);
+    OS=${PAIR[0]};
+    ARCH=${PAIR[1]};
+
+    cd ${ROOT_DIR}
+
+    PACKAGE_NAME_OS=${PACKAGE_NAME}_${OS}_${ARCH}
+    BUILD_DIR=${ROOT_DIR}/build/${PACKAGE_NAME_OS}
+
+    if [ $OS = "windows" ]; then
+        EXE=".exe"
+    fi
+
+    CGO_ENABLED=0 GOOS=${OS} GOARCH=${ARCH} go build -ldflags "-s -w" -trimpath -o ${BUILD_DIR}/${PACKAGE_NAME}/ttrace${EXE} ./cmd/mian.go
+
+    cd ${BUILD_DIR}
+    if [ $OS = "windows" ]; then
+        zip -r ${PACKAGE_NAME_OS}.zip ${PACKAGE_NAME}
+        mv ${PACKAGE_NAME_OS}.zip ${ROOT_DIR}
+    else
+        tar -czvf ${PACKAGE_NAME_OS}.tar.gz -p ${PACKAGE_NAME}
+        mv ${PACKAGE_NAME_OS}.tar.gz ${ROOT_DIR}
+    fi
+done
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
new file mode 100644
index 0000000..5f44444
--- /dev/null
+++ b/.github/workflows/docker.yml
@@ -0,0 +1,36 @@
+name: Building Docker and Push to DockerHub
+
+on:
+  push:
+    tags:
+      - v*
+    branches:
+      - main
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v3
+
+    - name: Log in to Docker Hub
+      uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
+      with:
+        username: ${{ secrets.DOCKER_USERNAME }}
+        password: ${{ secrets.DOCKER_PASSWORD }}
+
+    - name: Extract metadata (tags, labels) for Docker
+      id: meta
+      uses: docker/metadata-action@v3
+      with:
+        images: pactus/pactus
+
+    - name: Build and push
+      uses: docker/build-push-action@v2
+      with:
+        context: .
+        push: true
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
+        
\ No newline at end of file
diff --git a/.github/workflows/releaser.yml b/.github/workflows/releaser.yml
new file mode 100644
index 0000000..f7a0dab
--- /dev/null
+++ b/.github/workflows/releaser.yml
@@ -0,0 +1,69 @@
+name: Releaser
+
+on:
+  push:
+    tags:
+      - v*
+
+jobs:
+  ########################################
+  build-cli:
+    runs-on: ubuntu-latest
+
+    # Defining outputs for jobs
+    # https://docs.github.com/en/actions/using-jobs/defining-outputs-for-jobs
+    outputs:
+      checksums: ${{ steps.calc_checksums.outputs.checksums }}
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Install Dependencies
+      run: |
+        sudo apt update
+        sudo apt install zip
+
+    - name: Install Go
+      uses: actions/setup-go@v3
+      with:
+        go-version: 1.21.1
+
+    - name: Create release files
+      run: bash ./.github/releasers/releaser_cli.sh
+
+    # Multiline strings in GitHub actions
+    # https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#multiline-strings
+    - name: Calculate sha256sum
+      id: calc_checksums
+      run: |
+        set -e
+        EOF=$(dd if=/dev/urandom bs=15 count=1 status=none | base64)
+        echo "checksums<<$EOF"                          >> "$GITHUB_OUTPUT"
+        echo "$(sha256sum pactus-*.zip pactus-*tar.gz)" >> "$GITHUB_OUTPUT"
+        echo "$EOF"                                     >> "$GITHUB_OUTPUT"
+
+    - name: Publish
+      uses: softprops/action-gh-release@v1
+      with:
+        files: |
+          pactus-*.zip
+          pactus-*.tar.gz
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+ 
+  checksums:
+    needs: [build-cli]
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Create SHA256SUMS file
+      run: |
+        echo "${{ needs.build-cli.outputs.checksums }}" >> SHA256SUMS
+    - name: Publish
+      uses: softprops/action-gh-release@v1
+      with:
+        files: SHA256SUMS
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..c9a83fa
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,19 @@
+FROM golang:1.21.5-alpine3.18 as builder
+
+RUN apk add --no-cache git gmp-dev build-base g++ openssl-dev
+ADD . /ttrace
+
+# Building ttrace-cli
+RUN cd /ttrace && \
+    go build -ldflags "-s -w" -trimpath -o ./build/ttrace ./cmd/main.go
+
+
+## Copy binary files from builder into second container
+FROM golang:1.21.5-alpine3.18
+
+COPY --from=builder /timetrace/build/ttrace /usr/bin
+
+ENV WORKING_DIR "/ttrace"
+
+VOLUME $WORKING_DIR
+WORKDIR $WORKING_DIR
diff --git a/cmd/commands/ping.go b/cmd/commands/ping.go
new file mode 100644
index 0000000..5116902
--- /dev/null
+++ b/cmd/commands/ping.go
@@ -0,0 +1,42 @@
+package commands
+
+import (
+	"fmt"
+	"net"
+	"os"
+
+	cobra "github.com/spf13/cobra"
+)
+
+func PingCommand(parentCmd *cobra.Command) {
+	ping := &cobra.Command{
+		Use:   "ping",
+		Short: "Ping a remote instance of time trace.",
+	}
+	parentCmd.AddCommand(ping)
+
+	address := ping.Flags().StringP("address", "a", "localhost:7070", "remote address of your time trace instance.")
+	username := ping.Flags().StringP("username", "u", "root", "username of the user you are going to connect with.")
+	password := ping.Flags().StringP("password", "p", "", "password of user trying to connect with.")
+
+	ping.Run = func(cmd *cobra.Command, args []string) {
+		conn, err := net.Dial("tcp", *address)
+		if err != nil {
+			Dead(cmd, err)
+		}
+		defer conn.Close()
+
+		conQuery := fmt.Sprintf("CON %v %v", *username, *password)
+
+		do(conn, conQuery)
+
+		response := do(conn, "PING")
+		if response == "PONG" {
+			cmd.Println("PONG, everything is ok.")
+			os.Exit(0)
+		} else {
+			cmd.Printf("something is wrong: %v", response)
+			os.Exit(1)
+		}
+	}
+}
diff --git a/cmd/commands/repl.go b/cmd/commands/repl.go
index d99c2f8..17023bd 100644
--- a/cmd/commands/repl.go
+++ b/cmd/commands/repl.go
@@ -28,7 +28,7 @@ func REPLCommand(parentCmd *cobra.Command) {
 	connect.Run = func(cmd *cobra.Command, args []string) {
 		conn, err := net.Dial("tcp", *address)
 		if err != nil {
-			dead(cmd, err)
+			Dead(cmd, err)
 		}
 		defer conn.Close()
 
@@ -51,7 +51,7 @@ func REPLCommand(parentCmd *cobra.Command) {
 				cmd.Print(do(conn, input))
 			}
 		} else {
-			dead(cmd, errors.New(response)) //nolint
+			Dead(cmd, errors.New(response)) //nolint
 		}
 	}
 }
diff --git a/cmd/commands/run.go b/cmd/commands/run.go
index 8b2119e..b9cc659 100644
--- a/cmd/commands/run.go
+++ b/cmd/commands/run.go
@@ -20,12 +20,12 @@ func RunCommand(parentCmd *cobra.Command) {
 
 	run.Run = func(cmd *cobra.Command, args []string) {
 		if confingPath == nil || *confingPath == "" {
-			dead(cmd, tte.ErrInavlidConfigPath)
+			Dead(cmd, tte.ErrInavlidConfigPath)
 		}
 
 		cfg, err := config.LoadFromFile(*confingPath)
 		if err != nil {
-			dead(cmd, err)
+			Dead(cmd, err)
 		}
 
 		db := database.Init(cfg)
@@ -33,7 +33,7 @@ func RunCommand(parentCmd *cobra.Command) {
 
 		server := server.NewServer(cfg, db)
 		if err := server.Start(); err != nil {
-			dead(cmd, err)
+			Dead(cmd, err)
 		}
 	}
 }
diff --git a/cmd/commands/util.go b/cmd/commands/util.go
index 3b7c0ba..e6996f1 100644
--- a/cmd/commands/util.go
+++ b/cmd/commands/util.go
@@ -6,7 +6,7 @@ import (
 	"github.com/spf13/cobra"
 )
 
-func dead(cmd *cobra.Command, err error) {
+func Dead(cmd *cobra.Command, err error) {
 	cmd.PrintErrln(err)
 	os.Exit(1)
 }
diff --git a/cmd/main.go b/cmd/main.go
index bac612b..f350959 100644
--- a/cmd/main.go
+++ b/cmd/main.go
@@ -14,9 +14,10 @@ func main() {
 
 	commands.RunCommand(rootCmd)
 	commands.REPLCommand(rootCmd)
+	commands.PingCommand(rootCmd)
 
 	err := rootCmd.Execute()
 	if err != nil {
-		panic(err)
+		commands.Dead(rootCmd, err)
 	}
 }
diff --git a/core/TQL/execute/execute.go b/core/TQL/execute/execute.go
index ff7c0bb..69592ec 100644
--- a/core/TQL/execute/execute.go
+++ b/core/TQL/execute/execute.go
@@ -9,6 +9,7 @@ type ExecutorMap map[string]Executor
 var Executors ExecutorMap = ExecutorMap{
 	"SET":   database.IDataBase.AddSet,
 	"CON":   database.IDataBase.Connect,
+	"PING":  database.IDataBase.Ping,
 	"SSET":  database.IDataBase.AddSubSet,
 	"PUSH":  database.IDataBase.PushElement,
 	"DRPS":  database.IDataBase.DropSet,
diff --git a/core/database/database.go b/core/database/database.go
index 531659c..59e0092 100644
--- a/core/database/database.go
+++ b/core/database/database.go
@@ -45,6 +45,10 @@ func (db *Database) Connect(args []string) string {
 	return INVALID
 }
 
+func (db *Database) Ping(_ []string) string {
+	return PONG
+}
+
 func (db *Database) AddSet(args []string) string {
 	db.Lock()
 	defer db.Unlock()
diff --git a/core/database/interfaces.go b/core/database/interfaces.go
index ea0b954..84b43ce 100644
--- a/core/database/interfaces.go
+++ b/core/database/interfaces.go
@@ -4,6 +4,7 @@ type IDataBase interface {
 	SetsMap() Sets
 
 	Connect([]string) string
+	Ping([]string) string
 	AddSet([]string) string
 	AddSubSet([]string) string
 	PushElement([]string) string
diff --git a/core/database/types.go b/core/database/types.go
index 57e04e0..6d2bab1 100644
--- a/core/database/types.go
+++ b/core/database/types.go
@@ -9,6 +9,7 @@ import (
 const (
 	INVALID           = "INVALID"
 	DONE              = "DONE"
+	PONG              = "PONG"
 	SET_NOT_FOUND     = "SNF"
 	SUB_SET_NOT_FOUND = "SSNF"
 	ELEMENT_NOT_FOUND = "ENF"
diff --git a/doc/TQL/TQL.md b/doc/TQL/TQL.md
index 25e671a..39db30b 100644
--- a/doc/TQL/TQL.md
+++ b/doc/TQL/TQL.md
@@ -9,7 +9,8 @@ Time trace is using a query language called TQL. Here is documentation and speci
 
 | Command   |      Action      |  Arguments |
 |----------|:-------------|:------|
-| CON |  to make a connection and access to database | username - password |
+| CON * |  to make a connection and access to database | username - password |
+| PING * |  should send a `PONG` back if everything is ok |  |
 | SET * |    make a new set   | set-name |
 | SSET * | make a new subset | set-name - subset-name |
 | PUSH * | push an element to a subset | set-name - subset-name - value-of-element - time(unix-timestamp) |
diff --git a/doc/usage/.keep b/doc/usage/.keep
deleted file mode 100644
index e69de29..0000000
diff --git a/doc/usage/usage.md b/doc/usage/usage.md
new file mode 100644
index 0000000..c79339a
--- /dev/null
+++ b/doc/usage/usage.md
@@ -0,0 +1,2 @@
+# Usage of time trace
+