Ensure docker build updates public/ and remove other unnessary files from image

.dockerignore

@@ -2,7 +2,9 @@
 .editorconfig
 .env.testing
 .git*
+docker/
 package.json
+package-lock.json
 phpunit.xml
 webpack.mix.js
 yarn.lock

.gitlab-ci.yml

@@ -7,7 +7,7 @@ stages:
 cache:
   key: ${CI_COMMIT_REF_SLUG}
   paths:
-  - public/
+  - public/*/vendor/
   - node_modules/
   - vendor/
 

docker/Dockerfile

@@ -7,4 +7,4 @@ RUN mkdir -p ${COMPOSER_HOME} && \
 	touch .composer.refresh && \
 	mv .env.example .env && \
 	FORCE_PERMS=1 NGINX_START=FALSE /sbin/init && \
-	rm -rf ${COMPOSER_HOME}/* composer.lock package-lock.json
+	rm -rf ${COMPOSER_HOME}/* composer.lock