* Share database connections.
* Enforce security, authentication, role requirements, etc.
* And many other things...

All these, while minimizing code repetition.

## First Steps { #first-steps }

Let's see a very simple example. It will be so simple that it is not very useful, for now.

But this way we can focus on how the **Dependency Injection** system works.

        Providing context helps us come up with a solution that is most useful in the real world
    validations:
      required: false
  - type: textarea
    id: steps-to-reproduce
    attributes:
      label: Self-contained Reproducer Project
      description: |

Let's check back those deployment concepts from before:

* Security - HTTPS
* Running on startup
* Restarts
* **Replication (the number of processes running)**
* Memory
* Previous steps before starting

Up to this point, with all the tutorials in the docs, you have probably been running a **server program**, for example, using the `fastapi` command, that runs Uvicorn, running a **single process**.

        Providing context helps us come up with a solution that is most useful in the real world
    validations:
      required: false
  - type: textarea
    id: steps-to-reproduce
    attributes:
      label: Self-contained Reproducer Project
      description: |

should be reported by email to ******@****.***. Your email will be acknowledged within 48 hours,
and you'll receive a more detailed response to your email within 72 hours indicating the next steps
in handling your report.

Please, provide a detailed explanation of the issue. In particular, outline the type of the security

 * is by declaring that step to be the last step of the pipeline. Nevertheless, we refer to the
 * "value" of a successful step or the "result" (value or exception) of any step.
 *
 * <ol>
 *   <li>A pipeline starts at its leaf step (or steps), which is created from either a callable
 *       block or a {@link ListenableFuture}.

                subst p: "%teamcity.build.checkoutDir%"
                """.trimIndent()
            skipConditionally()
        }
    }
}

fun BuildType.cleanUpGitUntrackedFilesAndDirectories() {
    steps {
        script {
            name = "CLEAN_UP_GIT_UNTRACKED_FILES_AND_DIRECTORIES"
            executionMode = BuildStep.ExecutionMode.RUN_ONLY_ON_FAILURE

### Testing an example with awscli tool

> Use the same username and password created in the previous steps.

```
[foobar]
region = us-east-1
aws_access_key_id = foobar
aws_secret_access_key = foo12345
```

                supportTestRetry = (performanceTestBuildSpec.type != PerformanceTestType.FLAKINESS_DETECTION)
            }
            if (testProjects.isNotEmpty()) {
                steps {
                    preBuildSteps()
                    killProcessStep(buildTypeThis, KILL_ALL_GRADLE_PROCESSES, os)
                    substDirOnWindows(os)

            }

            param("env.PERFORMANCE_DB_PASSWORD_TCAGENT", "%performance.db.password.tcagent%")
            param("additional.gradle.parameters", "")
        }

        val buildTypeThis = this
        steps {
            killProcessStep(buildTypeThis, KILL_ALL_GRADLE_PROCESSES, os)
            substDirOnWindows(os)
            gradleWrapper {
                name = "GRADLE_RUNNER"