feat: Implement basic build & push capabilities for services (#68)

* wip: Build experiments

* wip: overall structure for build/push

* ref: Split method, add test fixture

* feat: Basic push functionality

* ref: Better structure and output

* feat: Handle registry auth

* feat: Integrate with deploy

* ref: Split into files

* fix: Modernize push options

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

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

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

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

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

@@ -0,0 +1,14 @@
+services:
+  service-no-build:
+    image: portainer/pause:3.9
+
+  busybox-first:
+    image: localhost:5000/busybox-first
+    build:
+      context: busybox-first/
+
+  busybox-second:
+    image: localhost:5000/busybox-second
+    build:
+      context: busybox-second/
+      dockerfile: Dockerfile.alt