Setup docker for production and development

Change ./init.sh to be an executable then run it.

The default inner container ports are as followed:
- Postgres: 5432:5432
- Backend: 3001:3000
- Frontend: 3000:3000

- Frontend dev: 8000

The backend image needs to be built:

docker compose up -d --build

backend/go.mod

@@ -0,0 +1,14 @@
+module fr.latosa-escrima
+
+go 1.23.4
+
+require (
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/joho/godotenv v1.5.1 // indirect
+	github.com/puzpuzpuz/xsync/v3 v3.4.0 // indirect
+	github.com/tmthrgd/go-hex v0.0.0-20190904060850-447a3041c3bc // indirect
+	github.com/uptrace/bun v1.2.8 // indirect
+	github.com/vmihailenco/msgpack/v5 v5.4.1 // indirect
+	github.com/vmihailenco/tagparser/v2 v2.0.0 // indirect
+	golang.org/x/sys v0.29.0 // indirect
+)