## Container Images

Docker has been one of the main tools to create and manage **container images** and **containers**.

And there's a public <a href="https://hub.docker.com/" class="external-link" target="_blank">Docker Hub</a> with pre-made **official container images** for many tools, environments, databases, and applications.

There's also the chance that for some reason you have a **spike** of usage of your API. Maybe it went viral, or maybe some other services or bots start using it. And you might want to have extra resources to be safe in those cases.

	optionalDeleteCmds := [][]string{
		// flush-then-delete our created chains
		{"-t", iptablesconstants.MANGLE, "-F", ChainInpodPrerouting},
		{"-t", iptablesconstants.MANGLE, "-F", ChainInpodOutput},
		{"-t", iptablesconstants.NAT, "-F", ChainInpodOutput},
		{"-t", iptablesconstants.MANGLE, "-X", ChainInpodPrerouting},
		{"-t", iptablesconstants.MANGLE, "-X", ChainInpodOutput},
		{"-t", iptablesconstants.NAT, "-X", ChainInpodOutput},
	}

Then we can test that it is used.

## Reading a `.env` file

If you have many settings that possibly change a lot, maybe in different environments, it might be useful to put them on a file and then read them from it as if they were environment variables.

			Key:         config.APISubSys,
			Description: "manage global HTTP API call specific features, such as throttling, authentication types, etc.",
		},
		config.HelpKV{
			Key:         config.ScannerSubSys,
			Description: "manage namespace scanning for usage calculation, lifecycle, healing and more",
		},
		config.HelpKV{
			Key:         config.BatchSubSys,
			Description: "manage batch job workers and wait times",
		},

	waypointCmd := &cobra.Command{
		Use:   "waypoint",
		Short: "Manage waypoint configuration",
		Long:  "A group of commands used to manage waypoint configuration",
		Example: `  # Apply a waypoint to the current namespace
  istioctl x waypoint apply

  # Generate a waypoint as yaml

| rmdir               | yes       |
| delete              | yes       |
| append              | no        |
| rename              | no        |

MinIO supports following FTP/SFTP based protocols to access and manage data.

- Secure File Transfer Protocol (SFTP) – Defined by the Internet Engineering Task Force (IETF) as an
  extended version of SSH 2.0, allowing file transfer over SSH and for use with Transport Layer

This also means that in many cases you can pass the same object you get from a request **directly to the database**, as everything is validated automatically.

The same applies the other way around, in many cases you can just pass the object you get from the database **directly to the client**.

---

"_Honestly, what you've built looks super solid and polished. In many ways, it's what I wanted **Hug** to be - it's really inspiring to see someone build that._"

       * prototype checker's JDK. However, the checker still sees the return type as plain
       * `Enumeration<?>`, probably because of one of the following two bugs (and maybe those two
       * bugs are themselves just symptoms of the same underlying problem):
       *
       * https://github.com/typetools/checker-framework/issues/3030
       *