move Docker-files in ./dockerfile dir

dockerfiles/Dockerfile

@@ -0,0 +1,18 @@
+# from custom image
+FROM ngx-template:latest
+
+ARG NET_NAME=kek
+ARG CONTAINER_NAME=lol
+ARG STATIC_FILE=/usr/share/nginx/html/index.html
+
+# change default nginx index.html
+RUN sed -i '13,21d' $STATIC_FILE && \
+    sed -i "13i <table>\
+    <tr><th>NETWORK</th><th>CONTAINER</th></tr>\
+    <tr><td>$NET_NAME</td><td>$CONTAINER_NAME</td></tr>\
+    </table>" $STATIC_FILE
+
+# commented lines don't work
+CMD /root/scripts/knocking_setup.sh \
+    && nginx && knockd -d && sleep infinity
+