title: How to mount docker tmpfs with exec,rw flags?
body: <p>What command line options can be used for enabling a <code>tmpfs</code> (temporary file system) inside a Docker container, that is <code>rw</code> (read/write) accessible and files on this fs (file system) are executable?</p>
  <p>Example would be a shared memory <code>tmpfs</code> with 1GByte size, but standard flag is <code>noexec</code></p>
  <pre><code>( shm on /dev/shm type tmpfs (rw,nosuid,nodev,noexec,relatime,size=1048576k) )
  </code></pre>
  <p>with:</p>
  <pre><code>docker -it --shm-size=1G alpine /bin/sh
  </code></pre>