1. Run build the custom otel collector

`docker build --no-cache .`

2. find the image to run `docker images`

3. run the image with versions

All of the below scenarios worked on v108.0 of otelcollector/spanmetrics

## Scenario 1: Only digits:

`docker run -e VERSION=123 <image hash>`

*Expected result*:
Start correctly (or atleast not fail on the VERSION)

*Actual result*: 
```
2024-12-11T15:44:04.882Z	warn	[email protected]/provider.go:51	Configuration references unset environment variable	{"name": "OTLP_ENDPOINT"}
2024-12-11T15:44:04.882Z	warn	[email protected]/provider.go:51	Configuration references unset environment variable	{"name": "OTLP_API_KEY"}
Error: failed to get config: cannot unmarshal the configuration: decoding failed due to the following error(s):

error decoding 'connectors': error reading configuration for "spanmetrics": decoding failed due to the following error(s):

'dimensions[0].default' expected type 'string', got unconvertible type 'int', value: '123'
2024/12/11 15:44:04 collector server run finished with error: failed to get config: cannot unmarshal the configuration: decoding failed due to the following error(s):

error decoding 'connectors': error reading configuration for "spanmetrics": decoding failed due to the following error(s):

'dimensions[0].default' expected type 'string', got unconvertible type 'int', value: '123'
```

`docker run -e VERSION=123e4 <image hash>`

*Expected result*:
Start correctly (or atleast not fail on the VERSION)

*Actual result*: 
```
...
Error: failed to get config: cannot unmarshal the configuration: decoding failed due to the following error(s):

error decoding 'connectors': error reading configuration for "spanmetrics": decoding failed due to the following error(s):

'dimensions[0].default' expected type 'string', got unconvertible type 'float64', value: '1.23e+06'
2024/12/11 15:45:40 collector server run finished with error: failed to get config: cannot unmarshal the configuration: decoding failed due to the following error(s):

error decoding 'connectors': error reading configuration for "spanmetrics": decoding failed due to the following error(s):

'dimensions[0].default' expected type 'string', got unconvertible type 'float64', value: '1.23e+06'
```

`docker run -e VERSION=v123 <image hash>`

*Expected result*:
Start correctly (or atleast not fail on the VERSION)

*Actual result*: 

Starts fine, giving next (expected errors):

```
...

Error: invalid configuration: exporters::otlp: requires a non-empty "endpoint"
2024/12/11 15:45:03 collector server run finished with error: invalid configuration: exporters::otlp: requires a non-empty "endpoint"
```