Added prebuild build task

Author: Simon Hofmann

ci/prebuild/Dockerfile

@@ -0,0 +1,6 @@
+ARG TAG
+
+FROM justadudewhohacks/opencv4nodejs-ci:${TAG}
+
+COPY ./ ./
+CMD ["bin/bash", "./ci/prebuild/script/run-prebuild.sh"]

ci/prebuild/package.json

@@ -0,0 +1,8 @@
+{
+  "scripts": {
+    "prebuild": "bash ./prebuild.sh"
+  },
+  "dependencies": {
+    "prebuild": "^8.2.0"
+  }
+}

ci/prebuild/prebuild.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+image=opencv4nodejs-ci_$1
+docker build -t $image -f ./Dockerfile --build-arg TAG=$1 ../../
+docker run $image

ci/prebuild/script/run-prebuild.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+export OPENCV4NODEJS_DISABLE_AUTOBUILD=1
+echo "Installing dependencies" &&\
+npm install --unsafe-perm &&\
+echo "Running prebuild" &&\
+cd ./prebuild &&\
+npm install --unsafe-perm &&\
+npm run prebuild