test: Add an e2e test for build&push (#69)

* test: Add an e2e test for build&push

* test: Add image cleanup

* test: Switch to assert.NoError

test/e2e/fixtures/compose-build-basic/busybox-first/Dockerfile

@@ -1,3 +0,0 @@
-FROM busybox:1.37.0-musl
-
-ENV SERVICE_NAME=busybox-first

test/e2e/fixtures/compose-build-basic/busybox-second/Dockerfile.alt

@@ -1,3 +0,0 @@
-FROM busybox:1.37.0-musl
-
-ENV SERVICE_NAME=busybox-second

test/e2e/fixtures/compose-build-basic/compose.yaml

@@ -2,13 +2,13 @@ services:
   service-no-build:
     image: portainer/pause:3.9
 
-  busybox-first:
-    image: localhost:5000/busybox-first
+  service-first:
+    image: 127.0.0.1:${TEST_REGISTRY_PORT}/service-first
     build:
-      context: busybox-first/
+      context: service-first-dir/
 
-  busybox-second:
-    image: localhost:5000/busybox-second
+  service-second:
+    image: 127.0.0.1:${TEST_REGISTRY_PORT}/service-second:version2
     build:
-      context: busybox-second/
+      context: service-second-dir/
       dockerfile: Dockerfile.alt

test/e2e/fixtures/compose-build-basic/service-first-dir/Dockerfile

@@ -0,0 +1,3 @@
+FROM portainer/pause:3.9
+
+ENV SERVICE_NAME=service-first

test/e2e/fixtures/compose-build-basic/service-second-dir/Dockerfile.alt

@@ -0,0 +1,3 @@
+FROM portainer/pause:3.9
+
+ENV SERVICE_NAME=service-second