[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.

dockerfiles/docker-entrypoint.sh

@@ -1,167 +0,0 @@
-#!/bin/sh
-
-help() {
-    cat <<EOF
-Command line:
-  -h  Display this help
-  -d  Dry run to update the configuration files.
-  -f  Always update on the configuration files (existing files are renamed with
-      the .old suffix).  Without this option, the new configuration files are
-      copied with the .new suffix
-Environment variables:
-  INSTANCE_NAME settings.yml : general.instance_name
-  AUTOCOMPLETE  settings.yml : search.autocomplete
-  BASE_URL      settings.yml : server.base_url
-  MORTY_URL     settings.yml : result_proxy.url
-  MORTY_KEY     settings.yml : result_proxy.key
-Volume:
-  /etc/searxng  the docker entry point copies settings.yml and uwsgi.ini in
-                this directory (see the -f command line option)"
-
-EOF
-}
-
-# Parse command line
-FORCE_CONF_UPDATE=0
-DRY_RUN=0
-
-while getopts "fdh" option
-do
-    case $option in
-
-        f) FORCE_CONF_UPDATE=1 ;;
-        d) DRY_RUN=1 ;;
-
-        h)
-            help
-            exit 0
-            ;;
-        *)
-            echo "unknow option ${option}"
-            exit 42
-            ;;
-    esac
-done
-
-echo "SearXNG version $SEARXNG_VERSION"
-
-# helpers to update the configuration files
-patch_uwsgi_settings() {
-    CONF="$1"
-
-    # update uwsg.ini
-    sed -i \
-        -e "s|workers = .*|workers = ${UWSGI_WORKERS:-%k}|g" \
-        -e "s|threads = .*|threads = ${UWSGI_THREADS:-4}|g" \
-        "${CONF}"
-}
-
-patch_searxng_settings() {
-    CONF="$1"
-
-    # Make sure that there is trailing slash at the end of BASE_URL
-    # see https://www.gnu.org/savannah-checkouts/gnu/bash/manual/bash.html#Shell-Parameter-Expansion
-    export BASE_URL="${BASE_URL%/}/"
-
-    # update settings.yml
-    sed -i \
-        -e "s|base_url: false|base_url: ${BASE_URL}|g" \
-        -e "s/instance_name: \"SearXNG\"/instance_name: \"${INSTANCE_NAME}\"/g" \
-        -e "s/autocomplete: \"\"/autocomplete: \"${AUTOCOMPLETE}\"/g" \
-        -e "s/ultrasecretkey/$(head -c 24 /dev/urandom | base64 | tr -dc 'a-zA-Z0-9')/g" \
-        "${CONF}"
-
-    # Morty configuration
-
-    if [ -n "${MORTY_KEY}" ] && [ -n "${MORTY_URL}" ]; then
-        sed -i -e "s/image_proxy: false/image_proxy: true/g" \
-            "${CONF}"
-        cat >> "${CONF}" <<-EOF
-
-# Morty configuration
-result_proxy:
-   url: ${MORTY_URL}
-   key: !!binary "${MORTY_KEY}"
-EOF
-    fi
-}
-
-update_conf() {
-    FORCE_CONF_UPDATE=$1
-    CONF="$2"
-    NEW_CONF="${2}.new"
-    OLD_CONF="${2}.old"
-    REF_CONF="$3"
-    PATCH_REF_CONF="$4"
-
-    if [ -f "${CONF}" ]; then
-        if [ "${REF_CONF}" -nt "${CONF}" ]; then
-            # There is a new version
-            if [ "$FORCE_CONF_UPDATE" -ne 0 ]; then
-                # Replace the current configuration
-                printf '⚠️  Automatically update %s to the new version\n' "${CONF}"
-                if [ ! -f "${OLD_CONF}" ]; then
-                    printf 'The previous configuration is saved to %s\n' "${OLD_CONF}"
-                    mv "${CONF}" "${OLD_CONF}"
-                fi
-                cp "${REF_CONF}" "${CONF}"
-                $PATCH_REF_CONF "${CONF}"
-            else
-                # Keep the current configuration
-                printf '⚠️  Check new version %s to make sure SearXNG is working properly\n' "${NEW_CONF}"
-                cp "${REF_CONF}" "${NEW_CONF}"
-                $PATCH_REF_CONF "${NEW_CONF}"
-            fi
-        else
-            printf 'Use existing %s\n' "${CONF}"
-        fi
-    else
-        printf 'Create %s\n' "${CONF}"
-        cp "${REF_CONF}" "${CONF}"
-        $PATCH_REF_CONF "${CONF}"
-    fi
-}
-
-# searx compatibility: copy /etc/searx/* to /etc/searxng/*
-SEARX_CONF=0
-if [ -f "/etc/searx/settings.yml" ]; then
-    if  [ ! -f "${SEARXNG_SETTINGS_PATH}" ]; then
-        printf '⚠️  /etc/searx/settings.yml is copied to /etc/searxng\n'
-        cp "/etc/searx/settings.yml" "${SEARXNG_SETTINGS_PATH}"
-    fi
-    SEARX_CONF=1
-fi
-if [ -f "/etc/searx/uwsgi.ini" ]; then
-    printf '⚠️  /etc/searx/uwsgi.ini is ignored. Use the volume /etc/searxng\n'
-    SEARX_CONF=1
-fi
-if [ "$SEARX_CONF" -eq "1" ]; then
-    printf '⚠️  The deprecated volume /etc/searx is mounted. Please update your configuration to use /etc/searxng ⚠️\n'
-    cat << EOF > /etc/searx/deprecated_volume_read_me.txt
-This Docker image uses the volume /etc/searxng
-Update your configuration:
-* remove uwsgi.ini (or very carefully update your existing uwsgi.ini using https://github.com/searxng/searxng/blob/master/dockerfiles/uwsgi.ini )
-* mount /etc/searxng instead of /etc/searx
-EOF
-fi
-# end of searx compatibility
-
-# make sure there are uwsgi settings
-update_conf "${FORCE_CONF_UPDATE}" "${UWSGI_SETTINGS_PATH}" "/usr/local/searxng/dockerfiles/uwsgi.ini" "patch_uwsgi_settings"
-
-# make sure there are searxng settings
-update_conf "${FORCE_CONF_UPDATE}" "${SEARXNG_SETTINGS_PATH}" "/usr/local/searxng/searx/settings.yml" "patch_searxng_settings"
-
-# dry run (to update configuration files, then inspect them)
-if [ $DRY_RUN -eq 1 ]; then
-    printf 'Dry run\n'
-    exit
-fi
-
-unset MORTY_KEY
-
-printf 'Listen on %s\n' "${BIND_ADDRESS}"
-
-# Start uwsgi
-# TODO: "--http-socket" will be removed in the future (see uwsgi.ini.new config file): https://github.com/searxng/searxng/pull/4578
-exec /usr/local/searxng/venv/bin/uwsgi --http-socket "${BIND_ADDRESS}" "${UWSGI_SETTINGS_PATH}"