[mod] rework container deployment (#4764)

container.yml will run after integration.yml COMPLETES successfully and in master branch.

Style changes, cleanup and improved integration with CI by leveraging the use of
shared cache between all workflows.

* Podman is now supported to build the container images (Docker also received a refactor, merging both build and buildx)
* Container images are being built by Buildah instead of Docker BuildKit.
* Container images are tested before release.
* Splitting "modern" (amd64 & arm64) and "legacy" (armv7) arches on different Dockerfiles allowing future optimizations.

manage

@@ -11,6 +11,9 @@ source "$(dirname "${BASH_SOURCE[0]}")/utils/lib.sh"
 # shellcheck source=utils/lib.sh
 source "$(dirname "${BASH_SOURCE[0]}")/utils/lib_nvm.sh"
 
+# shellcheck source=utils/lib_sxng_container.sh
+source "$(dirname "${BASH_SOURCE[0]}")/utils/lib_sxng_container.sh"
+
 # shellcheck source=utils/lib_sxng_data.sh
 source "$(dirname "${BASH_SOURCE[0]}")/utils/lib_sxng_data.sh"
 
@@ -77,9 +80,6 @@ docs.:
   gh-pages  : deploy on gh-pages branch
   prebuild  : build reST include files (./${DOCS_BUILD}/includes)
   clean     : clean documentation build
-docker.:
-  build     : build docker image
-  push      : build and push docker image
 gecko.driver:
   download & install geckodriver if not already installed (required for
   robot_tests)
@@ -101,6 +101,7 @@ EOF
     go.help
     node.help
     weblate.help
+    container.help
     data.help
     test.help
     themes.help
@@ -136,90 +137,6 @@ webapp.run() {
     SEARXNG_DEBUG=1 pyenv.cmd python -m searx.webapp
 }
 
-docker.push() {
-    docker.build push
-}
-
-docker.buildx() {
-    docker.build buildx
-}
-
-# shellcheck disable=SC2119
-docker.build() {
-    pyenv.install
-
-    local SEARXNG_GIT_VERSION
-    local VERSION_GITCOMMIT
-    local GITHUB_USER
-    local SEARXNG_IMAGE_NAME
-    local BUILD
-
-    build_msg DOCKER build
-    # run installation in a subprocess and activate pyenv
-
-    # See https://www.shellcheck.net/wiki/SC1001 and others ..
-    # shellcheck disable=SC2031,SC2230,SC2002,SC2236,SC2143,SC1001
-    (   set -e
-        pyenv.activate
-
-        # Check if it is a git repository
-        if [ ! -d .git ]; then
-	    die 1 "This is not Git repository"
-        fi
-        if [ ! -x "$(which git)" ]; then
-	    die 1 "git is not installed"
-        fi
-
-        if ! git remote get-url origin 2> /dev/null; then
-	    die 1 "there is no remote origin"
-        fi
-
-        # This is a git repository
-        git update-index -q --refresh
-        python -m searx.version freeze
-        eval "$(python -m searx.version)"
-
-        # Get the last git commit id
-        VERSION_GITCOMMIT=$(echo "$VERSION_TAG" | cut -d+ -f2)
-        build_msg DOCKER "Last commit : $VERSION_GITCOMMIT"
-
-        # define the docker image name
-        GITHUB_USER=$(echo "${GIT_URL}" | sed 's/.*github\.com\/\([^\/]*\).*/\1/')
-        SEARXNG_IMAGE_NAME="${SEARXNG_IMAGE_NAME:-${GITHUB_USER:-searxng}/searxng}"
-
-        BUILD="build"
-        if [ "$1" = "buildx" ]; then
-            # buildx includes the push option
-            CACHE_TAG="${SEARXNG_IMAGE_NAME}:latest-build-cache"
-            BUILD="buildx build --platform linux/amd64,linux/arm64,linux/arm/v7 --push --cache-from=type=registry,ref=$CACHE_TAG --cache-to=type=registry,ref=$CACHE_TAG,mode=max"
-            shift
-        fi
-        build_msg DOCKER "Build command: ${BUILD}"
-
-        # build Docker image
-        build_msg DOCKER "Building image ${SEARXNG_IMAGE_NAME}:${SEARXNG_GIT_VERSION}"
-        # shellcheck disable=SC2086
-        docker $BUILD \
-         --build-arg BASE_IMAGE="${DEPENDENCIES_IMAGE_NAME}" \
-         --build-arg GIT_URL="${GIT_URL}" \
-         --build-arg SEARXNG_DOCKER_TAG="${DOCKER_TAG}" \
-         --build-arg SEARXNG_GIT_VERSION="${VERSION_STRING}" \
-         --build-arg VERSION_GITCOMMIT="${VERSION_GITCOMMIT}" \
-         --build-arg LABEL_DATE="$(date -u +"%Y-%m-%dT%H:%M:%SZ")" \
-         --build-arg LABEL_VCS_REF="$(git rev-parse HEAD)" \
-         --build-arg LABEL_VCS_URL="${GIT_URL}" \
-         --build-arg TIMESTAMP_SETTINGS="$(git log -1 --format="%cd" --date=unix -- searx/settings.yml)" \
-         --build-arg TIMESTAMP_UWSGI="$(git log -1 --format="%cd" --date=unix -- dockerfiles/uwsgi.ini)" \
-         -t "${SEARXNG_IMAGE_NAME}:latest" -t "${SEARXNG_IMAGE_NAME}:${DOCKER_TAG}" .
-
-        if [ "$1" = "push" ]; then
-	        docker push "${SEARXNG_IMAGE_NAME}:latest"
-	        docker push "${SEARXNG_IMAGE_NAME}:${DOCKER_TAG}"
-	    fi
-    )
-    dump_return $?
-}
-
 # shellcheck disable=SC2119
 gecko.driver() {
     pyenv.install