add: backup scripts and docker image

scripts/dburl-parser.sh

@@ -0,0 +1,40 @@
+#! /bin/sh
+
+#
+# Parses a database URL in the format schema://user:
+#
+
+DB_URL="$1";
+
+SCHEMA="${DB_URL%//*}";
+SCHEMALESS_URL=${DB_URL#*//};
+LEFT_HAND=${SCHEMALESS_URL%@*};
+if test ! ${LEFT_HAND} = ${SCHEMALESS_URL}; then
+    USERNAME=$(echo ${LEFT_HAND} | cut -d ':' -f 1);
+    if test ! ${USERNAME} = ${LEFT_HAND}; then
+        PASSWORD=$(echo ${LEFT_HAND} | cut -d ':' -f 2);
+    fi
+fi
+RIGHT_HAND=${SCHEMALESS_URL#*@};
+HOST=$(echo ${RIGHT_HAND} | cut -d ':' -f 1 | cut -d '/' -f 1);
+if test -n "$(echo ${RIGHT_HAND} | grep -o ':')"; then
+    PORT=$(echo ${RIGHT_HAND} | cut -d ':' -f 2 | cut -d '/' -f 1);
+fi
+if test -n "$(echo ${RIGHT_HAND} | grep -o '/')"; then
+    DATABASE=$(echo ${RIGHT_HAND} | cut -d ':' -f 2 | cut -d '/' -f 2);
+fi
+
+# throw an error if DB_URL does not contains at least a HOST
+if test -z "${HOST}"; then
+    echo "database URL providen was invalid" && exit 1;
+fi
+
+cat << HEREDOC
+DB_SCHEMA=${SCHEMA%:}
+DB_USERNAME=${USERNAME}
+DB_PASSWORD=${PASSWORD}
+DB_HOST=${HOST}
+DB_PORT=${PORT}
+DB_NAME=${DATABASE}
+HEREDOC
+