chore: build youtube-dl from source

Dockerfile

@@ -1,17 +1,37 @@
+# create build from source
+FROM python:3 AS build
+
+WORKDIR /build
+
+RUN set -xe \
+    && apt-get update -y \
+    && apt-get install -y zip pandoc \
+    && curl -L https://github.com/ytdl-org/youtube-dl/archive/master.zip -o youtube-dl-master.zip \
+    && unzip youtube-dl-master.zip
+
+WORKDIR /build/youtube-dl-master
+
+RUN set -xe \
+    && make
+
+# add the build to the web container
 FROM node:12-alpine
 
-# install youtube-dl
+WORKDIR /app
+
+# copy the build
+COPY --from=build /build/youtube-dl-master/youtube-dl /usr/local/bin
+
+# install dependencies
 RUN set -xe \
+    && chmod  a+rx /usr/local/bin/youtube-dl \
     && apk add --no-cache ca-certificates \
                           ffmpeg \
                           openssl \
                           python3 \
-    && pip3 install --upgrade pip \
-    && pip3 install youtube-dl
+    && ln -s /usr/bin/python3 /usr/bin/python
 
 # install app dependencies
-WORKDIR /app
-
 RUN npm install -g yarn
 COPY package.json yarn.lock ./
 RUN yarn install

README.md

@@ -13,7 +13,11 @@ Meant to be used with Docker, but it would work locally if you have [youtube-dl]
 docker run -it --rm -p 8080:8080 -v $PWD/data:/app/data w33ble/youtube-dl-web
 ```
 
-Then hit `http://localhost:8080`, passing in a `url` and optionally a `format` query parameter for where to download from.
+Then hit `http://localhost:8080`, passing in a `url` and optionally a `format` query parameter for where to download from. For example:
+
+```text
+http://localhost:8080?url=https://www.youtube.com/watch?v=YE7VzlLtp-4
+```
 
 ### Automatic cleanup