RUN apk update && apk upgrade
# Install commonly needed tools
-RUN apk --no-cache add curl sudo bash
+RUN apk --no-cache add curl netcat-openbsd sudo
# Create 'so' user
-RUN addgroup -g 1000 so && adduser -S -u 1000 -G so so
+RUN addgroup -g 1000 so && adduser -S -u 1000 -G so -s /bin/sh so