Add Docker build with Node.js LTS (#2172)

Co-authored-by: nobk <nobk@noreplay.github.com>

docker/build.sh

@@ -0,0 +1,57 @@
+#!/usr/bin/bash
+TMP_BUD="/tmp/IosevkaDockerBuild"
+WORK_DIR="/work"
+PRIVATE_FILE="private-build-plans.toml"
+DEFAULT_ARGS="contents::Iosevka"
+HAS_CUSTOM=0
+BUILD_ARGS="$@"
+set -e
+rm -rf $TMP_BUD
+mkdir -p $TMP_BUD
+cd $TMP_BUD
+[[ -z $BUILD_ARGS ]] && echo 'Usage: docker run -it --rm -v $PWD:/work fontcc <BUILD_ARGS>'
+[[ -f "${WORK_DIR}/${PRIVATE_FILE}" ]] && {
+    HAS_CUSTOM=1
+    echo "Found $PRIVATE_FILE, custom build."
+    [[ -z $BUILD_ARGS ]] && {
+        FONT_NAME=$(grep -m1 -Po '(?<=\[buildPlans\.)[^\]]+' ${WORK_DIR}/${PRIVATE_FILE})
+        [[ -z "$FONT_NAME" ]] && {
+		echo "$PRIVATE_FILE file format error!"
+		exit 1
+	}
+        BUILD_ARGS="contents::$FONT_NAME"
+    }
+} || {
+    [[ -z $BUILD_ARGS ]] && {
+        BUILD_ARGS="$DEFAULT_ARGS"
+        echo "No parameter, default build."
+    }
+}
+echo "Fonts building param: $BUILD_ARGS"
+
+[[ -z "$VERSION_TAG" ]] && VERSION_TAG=$(curl -Ls --max-filesize 4096 \
+    'https://api.github.com/repos/be5invis/Iosevka/releases' \
+    | grep -m1 -Po '(?<="tag_name": ")v[\d\.]+')
+echo "Downloading source code tarball ${VERSION_TAG}"
+
+TARGZ_URL="https://github.com/be5invis/Iosevka/archive/${VERSION_TAG}.tar.gz"
+if [[ "main" == "$VERSION_TAG" ]] || [[ "dev" == "$VERSION_TAG" ]]; then
+    TARGZ_URL="https://github.com/be5invis/Iosevka/archive/refs/heads/${VERSION_TAG}.tar.gz"
+fi
+curl -LSOs "$TARGZ_URL" \
+    && tar -xf "${VERSION_TAG}.tar.gz" || {
+        echo "Decompression failed!"
+        exit 2
+    }
+cd Iosevka*
+
+[ "$HAS_CUSTOM" -eq 1 ] && cp "${WORK_DIR}/${PRIVATE_FILE}" .
+
+echo "Now building fonts ${VERSION_TAG}"
+
+[[ -n "$NPM_REG" ]] && npm config set registry $NPM_REG
+
+npm install \
+    && npm run build -- $BUILD_ARGS \
+    && cp -rf dist ${WORK_DIR}/
+