Change Dockerfiles to make the AMD image multidb

hooks/arches.sh

@@ -11,16 +11,11 @@ arches=(
 
 case "${DOCKER_REPO}" in
     *-mysql)
-        db=mysql
         arches=(amd64)
         ;;
     *-postgresql)
-        db=postgresql
         arches=(amd64)
         ;;
-    *)
-        db=sqlite
-        ;;
 esac
 
 if [[ "${DOCKER_TAG}" == *alpine ]]; then

hooks/build

@@ -9,6 +9,6 @@ set -ex
 for arch in "${arches[@]}"; do
     docker build \
            -t "${DOCKER_REPO}:${DOCKER_TAG}-${arch}" \
-           -f docker/${arch}/${db}/Dockerfile${os_suffix} \
+           -f docker/${arch}/Dockerfile${os_suffix} \
            .
 done