Add Dockerfile (#144)

This can be used to build browserpass (go and js) with docker-powers:
docker build -t browserpass-dev .
docker run --rm -v "$(pwd)":/browserpass browserpass-dev

Author: jayme-github

.gitignore

@@ -14,3 +14,4 @@ chrome/inject.js
 node_modules
 .vagrant/
 vendor/
+.*.swp

CONTRIBUTING.md

@@ -1,6 +1,6 @@
 # CONTRIBUTING
 
-You will need Node, [Yarn](https://yarnpkg.com/), Golang and [dep](https://github.com/golang/dep) installed.
+You will need Docker or Node, [Yarn](https://yarnpkg.com/), Golang and [dep](https://github.com/golang/dep) installed.
 
 ## To build
 - Run `make` to compile both front-end and back-end code
@@ -24,6 +24,28 @@ The commands above will generate unpacked extensions for both Firefox and Chrome
     - Click `Load temporary add-on`
     - Select `browserpass/firefox` directory
 
+## Build using Docker
+
+The [Dockerfile](Dockerfile) will set up a docker image suitable for running basic make targets such as building frontend and backend.
+
+The `crx` target is not supported by now (therefore `release` target will not work).
+
+To build the docker image run the following command in project root:
+```shell
+docker build -t browserpass-dev .
+```
+
+To build browserpass (frontend and backend) via docker, run the following from project root:
+```shell
+docker run --rm -v "$(pwd)":/browserpass browserpass-dev
+```
+
+If you only want to build front-end or backend, run one of the following:
+```shell
+docker run --rm -v "$(pwd)":/browserpass browserpass-dev js
+docker run --rm -v "$(pwd)":/browserpass browserpass-dev browserpass
+```
+
 ## Setting up a Vagrant build environment and building the Linux binary
 
 Vagrant will set up a virtual machine with all dependencies installed for you. Your local working directory is shared into the VM.

Dockerfile

@@ -0,0 +1,15 @@
+FROM golang:1.8-alpine3.6
+
+ENV CGO_ENABLED=0 \
+    APP_PATH="$GOPATH/src/github.com/dannyvankooten/browserpass"
+# New ENV statement as this depends on APP_PATH
+ENV PATH="$PATH:$APP_PATH/node_modules/.bin/"
+
+RUN apk add --no-cache bash git make tar yarn zip && \
+    go get -u github.com/golang/dep/cmd/dep && \
+    mkdir -p $APP_PATH && \
+    ln -s $APP_PATH /
+
+WORKDIR $APP_PATH
+
+ENTRYPOINT ["make"]