ci: ensure all compose files are valid compose v2 + formatting

test/test_fallback.data/custom-fallback.yml

@@ -1,9 +1,12 @@
+version: "2"
+
 services:
   sut:
     image: nginxproxy/nginx-proxy:test
     volumes:
       - /var/run/docker.sock:/tmp/docker.sock:ro
       - ./custom-fallback.conf:/etc/nginx/conf.d/zzz-custom-fallback.conf:ro
+
   http-only:
     image: web
     expose:

test/test_fallback.data/nodefault.yml

@@ -1,9 +1,12 @@
+version: "2"
+
 services:
   sut:
     image: nginxproxy/nginx-proxy:test
     volumes:
       - /var/run/docker.sock:/tmp/docker.sock:ro
       - ./nodefault.certs:/etc/nginx/certs:ro
+
   https-and-http:
     image: web
     expose:
@@ -11,6 +14,7 @@ services:
     environment:
       WEB_PORTS: "81"
       VIRTUAL_HOST: https-and-http.nginx-proxy.test
+
   https-only:
     image: web
     expose:
@@ -19,6 +23,7 @@ services:
       WEB_PORTS: "82"
       VIRTUAL_HOST: https-only.nginx-proxy.test
       HTTPS_METHOD: nohttp
+
   http-only:
     image: web
     expose:
@@ -27,6 +32,7 @@ services:
       WEB_PORTS: "83"
       VIRTUAL_HOST: http-only.nginx-proxy.test
       HTTPS_METHOD: nohttps
+
   missing-cert:
     image: web
     expose:

test/test_fallback.data/nohttp-on-app.yml

@@ -1,3 +1,5 @@
+version: "2"
+
 services:
   sut:
     image: nginxproxy/nginx-proxy:test
@@ -6,6 +8,7 @@ services:
       - ./withdefault.certs:/etc/nginx/certs:ro
     environment:
       HTTPS_METHOD: redirect
+
   https-only:
     image: web
     expose:

test/test_fallback.data/nohttp-with-missing-cert.yml

@@ -1,3 +1,5 @@
+version: "2"
+
 services:
   sut:
     image: nginxproxy/nginx-proxy:test
@@ -6,6 +8,7 @@ services:
       - ./withdefault.certs:/etc/nginx/certs:ro
     environment:
       HTTPS_METHOD: nohttp
+
   https-only:
     image: web
     expose:
@@ -13,6 +16,7 @@ services:
     environment:
       WEB_PORTS: "82"
       VIRTUAL_HOST: https-only.nginx-proxy.test
+
   missing-cert:
     image: web
     expose:

test/test_fallback.data/nohttp.yml

@@ -1,3 +1,5 @@
+version: "2"
+
 services:
   sut:
     image: nginxproxy/nginx-proxy:test
@@ -6,6 +8,7 @@ services:
       - ./withdefault.certs:/etc/nginx/certs:ro
     environment:
       HTTPS_METHOD: nohttp
+
   https-only:
     image: web
     expose:

test/test_fallback.data/nohttps-on-app.yml

@@ -1,3 +1,5 @@
+version: "2"
+
 services:
   sut:
     image: nginxproxy/nginx-proxy:test
@@ -5,6 +7,7 @@ services:
       - /var/run/docker.sock:/tmp/docker.sock:ro
     environment:
       HTTPS_METHOD: redirect
+
   http-only:
     image: web
     expose:

test/test_fallback.data/nohttps.yml

@@ -1,3 +1,5 @@
+version: "2"
+
 services:
   sut:
     image: nginxproxy/nginx-proxy:test
@@ -5,6 +7,7 @@ services:
       - /var/run/docker.sock:/tmp/docker.sock:ro
     environment:
       HTTPS_METHOD: nohttps
+
   http-only:
     image: web
     expose:

test/test_fallback.data/withdefault.yml

@@ -1,9 +1,12 @@
+version: "2"
+
 services:
   sut:
     image: nginxproxy/nginx-proxy:test
     volumes:
       - /var/run/docker.sock:/tmp/docker.sock:ro
       - ./withdefault.certs:/etc/nginx/certs:ro
+
   https-and-http:
     image: web
     expose:
@@ -11,6 +14,7 @@ services:
     environment:
       WEB_PORTS: "81"
       VIRTUAL_HOST: https-and-http.nginx-proxy.test
+
   https-only:
     image: web
     expose:
@@ -19,6 +23,7 @@ services:
       WEB_PORTS: "82"
       VIRTUAL_HOST: https-only.nginx-proxy.test
       HTTPS_METHOD: nohttp
+
   http-only:
     image: web
     expose:
@@ -27,6 +32,7 @@ services:
       WEB_PORTS: "83"
       VIRTUAL_HOST: http-only.nginx-proxy.test
       HTTPS_METHOD: nohttps
+
   missing-cert:
     image: web
     expose: