docker: Fix docker command entry.

docker/Dockerfile

@@ -0,0 +1,8 @@
+# use "make dockerimage" to build
+FROM alpine:3.3
+RUN apk add --no-cache ca-certificates bash
+ADD minio.dockerimage /minio
+ADD export /export
+EXPOSE 9000
+COPY start.sh /start.sh
+ENTRYPOINT ["/start.sh"]

docker/start.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+if [ "$1" = 'fs' ]; then
+    if [ -z "$2" ]; then
+        echo "Invalid arguments"
+        echo "Usage: fs <export_dir>"
+        exit 1
+    else
+        /bin/mkdir -p "$2" && /minio init fs "$2" && /minio server
+    fi
+else
+    echo "Usage: fs <export_dir>"
+    exit 0
+fi