Added rust/postgres/postgres/firststep.

create dev environment.

rust/sql/postgres/postgres/firststep/README.md

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+# rust postgres firststep
+
+## Development
+
+### Start dev environment
+
+```sh
+docker compose up -d
+```
+
+### Attach application container
+
+```sh
+docker compose exec app bash
+```
+
+
+### Setup project
+
+```sh
+cargo init
+cargo add postgres --features="with-uuid-1"
+cargo add uuid
+```
+
+### Run
+
+```sh
+cargo run
+```
+
+## References
+
+- [postgres - crates.io: Rust Package Registry](https://crates.io/crates/postgres)
+- [postgres - Rust](https://docs.rs/postgres/latest/postgres/)
+- [Config in postgres::config - Rust](https://docs.rs/postgres/latest/postgres/config/struct.Config.html)
+

rust/sql/postgres/postgres/firststep/conf/postgres/init.d/000_droptables.sql

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+DROP TABLE IF EXISTS "device";
+DROP TABLE IF EXISTS "user";
+

rust/sql/postgres/postgres/firststep/conf/postgres/init.d/001_create_tables.sql

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+CREATE TABLE "user" (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid()
+    , name text NOT NULL
+);
+
+CREATE TABLE "device" (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid()
+    , name text NOT NULL
+    , user_id UUID REFERENCES "user"(id)
+);

rust/sql/postgres/postgres/firststep/conf/postgres/init.d/101_create_test_data.sql

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+INSERT INTO "user" (id, name)
+    values
+        ('{d35696e8-5aa0-4b35-88cf-ded521b3dede}', 'user1')
+        , ('{d35696e8-5aa0-4b35-88cf-ded521b3dedd}', 'user2')
+        , ('{d35696e8-5aa0-4b35-88cf-ded521b3dedc}', 'user3')
+        , ('{d35696e8-5aa0-4b35-88cf-ded521b3dedb}', 'user4')
+        , ('{d35696e8-5aa0-4b35-88cf-ded521b3deda}', 'user5')
+        ;
+
+INSERT INTO "device" (id, name, user_id)
+    values
+    ('{d35696e8-5aa0-4b35-98cf-ded521b3dede}', 'device11', '{d35696e8-5aa0-4b35-88cf-ded521b3dede}')
+    , ('{d35696e8-5aa0-4b35-98cf-ded521b3dedd}', 'device12', '{d35696e8-5aa0-4b35-88cf-ded521b3dede}')
+    , ('{d35696e8-5aa0-4b35-98cf-ded521b3dedc}', 'device13', '{d35696e8-5aa0-4b35-88cf-ded521b3dede}')
+    , ('{d35696e8-5aa0-4b35-98cf-ded521b3dedb}', 'device14', '{d35696e8-5aa0-4b35-88cf-ded521b3dede}')
+    , ('{d35696e8-5aa0-4b35-98cf-ded521b3deda}', 'device15', '{d35696e8-5aa0-4b35-88cf-ded521b3dede}')
+    , ('{d35696e8-5aa0-4b35-a8cf-ded521b3dede}', 'device21', '{d35696e8-5aa0-4b35-88cf-ded521b3dedd}')
+    , ('{d35696e8-5aa0-4b35-a8cf-ded521b3dedd}', 'device22', '{d35696e8-5aa0-4b35-88cf-ded521b3dedd}')
+    , ('{d35696e8-5aa0-4b35-a8cf-ded521b3dedc}', 'device23', '{d35696e8-5aa0-4b35-88cf-ded521b3dedd}')
+    , ('{d35696e8-5aa0-4b35-a8cf-ded521b3dedb}', 'device24', '{d35696e8-5aa0-4b35-88cf-ded521b3dedd}')
+    , ('{d35696e8-5aa0-4b35-a8cf-ded521b3deda}', 'device25', '{d35696e8-5aa0-4b35-88cf-ded521b3dedd}')
+    ;

rust/sql/postgres/postgres/firststep/docker-compose.yaml

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+version: '3'
+
+services:
+  app:
+    image: rust
+    init: true
+    environment:
+      POSTGRES_HOST: "postgres:5432"
+      POSTGRES_DB: "postgres"
+      POSTGRES_USER: "postgres"
+      POSTGRES_PASSWORD: "password"
+    command:
+      - sleep
+      - infinity
+    volumes:
+      - "./project:/project"
+    working_dir: /project
+  postgres:
+    image: postgres:15
+    init: true
+    restart: always
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+      - ./conf/postgres/init.d/:/docker-entrypoint-initdb.d
+    environment:
+      POSTGRES_DB: "postgres"
+      POSTGRES_USER: "postgres"
+      POSTGRES_PASSWORD: "password"
+    ports:
+      - "0.0.0.0:5432:5432"
+
+volumes:
+  postgres_data:
+    driver: local
+

rust/sql/postgres/postgres/firststep/project/.gitignore

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+/target