CI/CD

backend/.gitlab-ci.yml

@@ -0,0 +1,15 @@
+stages:
+  - build
+
+variables:
+  IMAGE_NAME: registry.gitlab.com/$CI_PROJECT_PATH
+
+build:
+  stage: build
+  image: docker:latest
+  services:
+    - docker:dind
+  script:
+    - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY
+    - docker build -t $IMAGE_NAME:latest .
+    - docker push $IMAGE_NAME:latest

backend/Dockerfile

@@ -0,0 +1,10 @@
+FROM golang:1.22-alpine
+
+WORKDIR /app
+COPY . .
+
+RUN go build -o app
+
+EXPOSE 8080
+
+CMD ["./app"]

backend/db.go

@@ -5,23 +5,23 @@ import (
 	"fmt"
 	"os"
 
-	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgxpool"
 )
 
-var db *pgx.Conn
+var db *pgxpool.Pool
 
 func connectDB() {
-	var err error
 
 	connStr := os.Getenv("DB_URL")
 	if connStr == "" {
 		panic("DB_URL not set")
 	}
 
-	db, err = pgx.Connect(context.Background(), connStr)
+	var err error
+	db, err = pgxpool.New(context.Background(), connStr)
 	if err != nil {
 		panic(err)
 	}
 
-	fmt.Println("Connected to PostgreSQL")
+	fmt.Println("Connected to PostgreSQL (pool)")
 }

backend/go.mod

@@ -7,5 +7,7 @@ require (
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
 	github.com/jackc/pgx/v5 v5.8.0 // indirect
+	github.com/jackc/puddle/v2 v2.2.2 // indirect
+	golang.org/x/sync v0.17.0 // indirect
 	golang.org/x/text v0.29.0 // indirect
 )

backend/go.sum

@@ -7,10 +7,14 @@ github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 h1:iCEnooe7Ulw
 github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761/go.mod h1:5TJZWKEWniPve33vlWYSoGYefn3gLQRzjfDlhSJ9ZKM=
 github.com/jackc/pgx/v5 v5.8.0 h1:TYPDoleBBme0xGSAX3/+NujXXtpZn9HBONkQC7IEZSo=
 github.com/jackc/pgx/v5 v5.8.0/go.mod h1:QVeDInX2m9VyzvNeiCJVjCkNFqzsNb43204HshNSZKw=
+github.com/jackc/puddle/v2 v2.2.2 h1:PR8nw+E/1w0GLuRFSmiioY6UooMp6KJv0/61nB7icHo=
+github.com/jackc/puddle/v2 v2.2.2/go.mod h1:vriiEXHvEE654aYKXXjOvZM39qJ0q+azkZFrfEOc3H4=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+golang.org/x/sync v0.17.0 h1:l60nONMj9l5drqw6jlhIELNv9I0A4OFgRsG9k2oT9Ug=
+golang.org/x/sync v0.17.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
 golang.org/x/text v0.29.0 h1:1neNs90w9YzJ9BocxfsQNHKuAT4pkghyXc4nhZ6sJvk=
 golang.org/x/text v0.29.0/go.mod h1:7MhJOA9CD2qZyOKYazxdYMF85OwPdEr9jTtBpO7ydH4=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

backend/main.go

@@ -4,6 +4,7 @@ package main
 
 import (
 	"net/http"
+	"os"
 
 	"github.com/go-chi/chi/v5"
 )
@@ -17,7 +18,12 @@ func main() {
 	r.Get("/users", getUsers)
 	r.Post("/users", createUser)
 
-	http.ListenAndServe(":8080", r)
+	port := os.Getenv("PORT")
+	if port == "" {
+		port = "8080"
+	}
+
+	http.ListenAndServe(":"+port, r)
 }
 
 /*package main