nginx-golang-mysql: add dev envs support (#274)

* Add Docker Desktop Development Environments config
* Use nginx image with read-only bind mount instead of building a
  custom image
* Upgrade Go dependencies

Co-authored-by: Guillaume Lours <guillaume@lours.me>
Signed-off-by: Milas Bowman <milas.bowman@docker.com>

nginx-golang-mysql/compose.yaml

@@ -1,20 +1,23 @@
 services:
   backend:
-    build: backend
+    build:
+      context: backend
+      target: builder
     secrets:
       - db-password
     depends_on:
       db:
         condition: service_healthy
+
   db:
     # We use a mariadb image which supports both amd64 & arm64 architecture
-    image: mariadb:10.6.4-focal
+    image: mariadb:10-focal
     # If you really want to use MySQL, uncomment the following line
-    #image: mysql:8.0.27
+    #image: mysql:8
     command: '--default-authentication-plugin=mysql_native_password'
     restart: always
     healthcheck:
-      test: ["CMD", "mysqladmin", "ping", "-h", "127.0.0.1", "--silent"]
+      test: ['CMD-SHELL', 'mysqladmin ping -h 127.0.0.1 --password="$$(cat /run/secrets/db-password)" --silent']
       interval: 3s
       retries: 5
       start_period: 30s
@@ -27,14 +30,22 @@ services:
       - MYSQL_ROOT_PASSWORD_FILE=/run/secrets/db-password
     expose:
       - 3306
+
   proxy:
-    build: proxy
+    image: nginx
+    volumes:
+      - type: bind
+        source: ./proxy/nginx.conf
+        target: /etc/nginx/conf.d/default.conf
+        read_only: true
     ports:
       - 80:80
     depends_on: 
       - backend
+
 volumes:
   db-data:
+
 secrets:
   db-password:
     file: db/password.txt