added caching to build stage to vastly reduce build times and moved docker stuff to separate folder. Also added priv folder to minimize chance of leaking secrets. Lastly removed build script and replaced with a simple makefile to rebuild container and spin up compose file.

.gitignore

@@ -21,4 +21,6 @@
 # Go workspace file
 go.work
 
-.env
+priv
+# ensures readme still available
+!priv/readme.md

Makefile

@@ -0,0 +1,8 @@
+build: 
+	docker build -t adonis -f docker/Dockerfile .
+
+up: build
+	docker compose -f docker/docker-compose.yml --env-file priv/env up
+
+clean:
+	go clean

build.sh

@@ -1,4 +0,0 @@
-#! /usr/bin/env bash
-
-# ensures correct tag is applied
-docker build . -t adonis

docker/Dockerfile

@@ -9,7 +9,10 @@ RUN go mod download
 
 # this could be simplified a lot by being stricter on what we copy.
 COPY . . 
-RUN CGO_ENABLED=0 GOOS=linux go build -o adonis .
+
+ENV GOCACHE=/root/.cache/go-build
+
+RUN --mount=type=cache,target="/root/.cache/go-build" CGO_ENABLED=0 GOOS=linux go build -o adonis .
 
 # copy only binary and static files to slim image size
 FROM alpine

docker/docker-compose.yml

@@ -14,7 +14,11 @@ services:
     image: adonis:latest
     ports:
       - "42069:80"
-    env_file: ".env"
+    environment:
+      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
+      - POSTGRES_USER=${POSTGRES_USER}
+      - POSTGRES_DB=${POSTGRES_DB}
+      - POSTGRES_HOSTNAME=${POSTGRES_HOSTNAME}
     depends_on:
       - postgres
     networks:

internal/db/db.go

@@ -5,6 +5,7 @@ import (
 	"context"
 	"fmt"
 	"os"
+	"time"
 
 	"github.com/jackc/pgx/v5/pgxpool"
 )
@@ -19,9 +20,11 @@ func NewDatabase(username, password, hostname, database string) *Database {
 	url := url(username, password, hostname, database)
 	dbpool, err := pgxpool.New(context.Background(), url)
 
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "Unable to create connection pool: %v\n", err)
-		os.Exit(1)
+	for err != nil {
+		dbpool, err = pgxpool.New(context.Background(), url)
+		fmt.Fprintf(os.Stderr, "Unable to create connection pool: %v\nRetrying...\n", err)
+		//os.Exit(1)
+		time.Sleep(1 * time.Second)
 	}
 	var greeting string
 	err = dbpool.QueryRow(context.Background(), "select 'Hello, world!'").Scan(&greeting)

main.go

@@ -45,7 +45,7 @@ func main() {
 	database := os.Getenv("POSTGRES_DB")
 	hostname := os.Getenv("POSTGRES_HOSTNAME")
 
-	db.NewDatabase(username, password, hostname, database)
+	go db.NewDatabase(username, password, hostname, database)
 
 	// attach webserver
 	log.Fatal(http.ListenAndServe(":80", nil))