fix: resolve DOCKERFILE_HADOLINT

Author: fibu0125

alpine/Dockerfile

@@ -10,17 +10,18 @@ ARG TMP_DIR="/tmp"
 
 COPY requirements.txt ${BACKUP_DAEMON_HOME}/
 
+# hadolint ignore=DL3018
 RUN set -x \
-    && pip3 install --upgrade pip==${PIP} setuptools==${SETUPTOOLS} \
+    && pip3 install --no-cache-dir --upgrade pip==${PIP} setuptools==${SETUPTOOLS} \
     && rm -rf /var/cache/apk/* \
     && apk add --no-cache curl sqlite sqlite-dev build-base ca-certificates \
     && wget \
         -nv \
         -O ${TMP_DIR}/apsw-${PY_APSW_VER}.zip \
         "https://github.com/rogerbinns/apsw/releases/download/${PY_APSW_VER}/apsw-${PY_APSW_VER}.zip" \
-    && unzip ${TMP_DIR}/apsw-${PY_APSW_VER}.zip && cd ./apsw-${PY_APSW_VER}/ && python setup.py install \
-    && rm -rf ${TMP_DIR}/* \
-    && pip3 install -r ${BACKUP_DAEMON_HOME}/requirements.txt \
+    && unzip ${TMP_DIR}/apsw-${PY_APSW_VER}.zip && python ${TMP_DIR}/apsw-${PY_APSW_VER}/setup.py install \
+    && rm -rf "${TMP_DIR:?}/"* \
+    && pip3 install --no-cache-dir -r ${BACKUP_DAEMON_HOME}/requirements.txt \
     && apk del build-base
 
 RUN addgroup -S backup && adduser -S backup -G backup
@@ -30,13 +31,11 @@ RUN python3 -m unittest discover -s ${BACKUP_DAEMON_HOME} -p "*_tests.py"
 
 COPY tools/bdcli.py /usr/bin/bdcli
 
-RUN chmod +x /usr/bin/bdcli
-RUN chmod 777 /var/log
-
-RUN mkdir -p ${S3_CERT_PATH_INTERNAL} \
-    && chmod 770 ${S3_CERT_PATH_INTERNAL}
-
-RUN chown -R backup:backup ${BACKUP_DAEMON_HOME} ${S3_CERT_PATH_INTERNAL} /var/log
+RUN chmod +x /usr/bin/bdcli \
+    && chmod 770 /var/log \
+    && mkdir -p ${S3_CERT_PATH_INTERNAL} \
+    && chmod 770 ${S3_CERT_PATH_INTERNAL} \
+    && chown -R backup:backup ${BACKUP_DAEMON_HOME} ${S3_CERT_PATH_INTERNAL} /var/log
 
 USER backup