Better workflow - release vs debug, caching, ...

[zrzka]

I think that this example should be updated, because Rust popularity is growing. I'd add following things.

Building

• dependencies caching (see Dockerfile.template)
• allow to select debug vs --release

Sample scripts

• local-push.sh
  • generates Dockerfile from Dockerfile.template
  • pushes debug by default

Final image

• do not include source code
• do not include build tools
• just final binary (+ assets, ...)
• again, see Dockerfile.template

To sum it up, show users the complete workflow. Development -> production.

[zrzka]

#8 merged.