Add automated releases with binaries and simplify CI workflow

- Add GoReleaser configuration for Linux binaries (amd64, arm64)
- Add release job to GitHub Actions for tagged versions
- Remove github.server_url validations (Gitea CI disabled)
- Update README with binary download instructions
- Releases will include compiled binaries and changelogs

.goreleaser.yml

@@ -0,0 +1,48 @@
+version: 2
+
+before:
+  hooks:
+    - go mod tidy
+
+builds:
+  - id: apocapoc-api
+    main: ./cmd/api
+    binary: apocapoc-api
+    env:
+      - CGO_ENABLED=1
+    goos:
+      - linux
+    goarch:
+      - amd64
+      - arm64
+    ldflags:
+      - -s -w
+
+archives:
+  - id: apocapoc-api
+    name_template: "{{ .ProjectName }}_{{ .Version }}_{{ .Os }}_{{ .Arch }}"
+    format: tar.gz
+    files:
+      - README.md
+      - LICENSE
+
+checksum:
+  name_template: 'checksums.txt'
+
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - '^docs:'
+      - '^test:'
+      - '^ci:'
+      - Merge pull request
+      - Merge branch
+
+release:
+  github:
+    owner: davidfolch
+    name: apocapoc-api
+  draft: false
+  prerelease: auto
+  name_template: "{{.Tag}}"