Update GoReleaser config

Discard custom archive name overrides. The provided defaults are more popular among similar projects.
Also, set "zip" as the archive format for all artifacts, since that's the most common approach suitable for all platforms.

.goreleaser.yml

@@ -19,26 +19,18 @@ builds:
     goarch: 386
 
 archives:
-- replacements:
-    darwin: Darwin
-    linux: Linux
-    windows: Windows
-    386: i386
-    amd64: x86_64
-  format_overrides:
-    - goos: windows
-      format: zip
+- format: zip
 
 checksum:
   name_template: 'checksums.txt'
 
 dockers:
-- image_templates:
+- dockerfile: Dockerfile
+  goos: linux
+  goarch: amd64
+  image_templates:
   - 'legal90/{{.ProjectName}}:{{ .Tag }}'
   - 'legal90/{{.ProjectName}}:latest'
-  dockerfile: Dockerfile
-  binaries:
-  - '{{.ProjectName}}'
   build_flag_templates:
   - "--pull"
   - "--label=org.opencontainers.image.created={{.Date}}"