Add Dockerfile for testing

Signed-off-by: Haris Gušić <[email protected]>

Dockerfile

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+FROM alpine:3.14.3
+
+# Install dependencies
+# NOTE: GNU sed is required by make install
+RUN apk add --no-cache make git bash sed
+
+WORKDIR /collection
+
+RUN adduser -D user && chown -R user .
+USER user
+RUN git clone "https://github.com/veracioux/tuterm-collection" /collection
+
+WORKDIR /app
+
+# Install tuterm
+USER root
+COPY . .
+RUN make install PREFIX=/usr
+
+WORKDIR /collection
+
+USER user
+CMD sh