fixe syntax error

rfidac/Dockerfile

@@ -6,8 +6,8 @@ RUN echo "rfidac:x:100:105:RFIC AC,,,:/opt:/sbin/nologin" >> /etc/passwd \
  && apk add --no-cache --update python3 \
  && pip3 install --upgrade pip setuptools \
  && apk add --no-cache linux-headers gcc musl-dev python3-dev \
- && pip3 install evdev
- && apk rm linux-headers gcc musl-dev python3-dev
+ && pip3 install evdev \
+ && apk rm linux-headers gcc musl-dev python3-dev \
  && apk add --no-cache mpc
 
 ADD rfid-test.py /opt/rfid-test.py