Simplify build script

build.sh

@@ -275,7 +275,6 @@ echo "🏭  Building the following targets:" "${DOCKER_TARGETS[@]}"
 ###
 # Build each target
 ###
-export DOCKER_BUILDKIT=${DOCKER_BUILDKIT-1}
 for DOCKER_TARGET in "${DOCKER_TARGETS[@]}"; do
   echo "🏗  Building the target '${DOCKER_TARGET}'"
 
@@ -379,7 +378,9 @@ for DOCKER_TARGET in "${DOCKER_TARGETS[@]}"; do
   if [ "${SHOULD_BUILD}" != "true" ]; then
     echo "⏯  Build skipped because sources didn't change"
     echo "::set-output name=skipped::true"
-  else
+    continue
+  fi
+
   ###
   # Composing all arguments for `docker build`
   ###
@@ -428,7 +429,6 @@ for DOCKER_TARGET in "${DOCKER_TARGETS[@]}"; do
   if [ -n "${DOCKER_FROM}" ]; then
     DOCKER_BUILD_ARGS+=(--build-arg "FROM=${DOCKER_FROM}")
   fi
-    # shellcheck disable=SC2031
   if [ -n "${HTTP_PROXY}" ]; then
     DOCKER_BUILD_ARGS+=(--build-arg "http_proxy=${HTTP_PROXY}")
     DOCKER_BUILD_ARGS+=(--build-arg "https_proxy=${HTTPS_PROXY}")
@@ -495,5 +495,4 @@ for DOCKER_TARGET in "${DOCKER_TARGETS[@]}"; do
     echo "👷  Removing Buildx Builder '${BUILDX_BUILDER_NAME}'"
     $DRY docker buildx rm "${BUILDX_BUILDER_NAME}"
   fi
-  fi
 done