Update Dockerfile to be platform-agnostic

[seslash]

Current docker file hardcodes compile platform to be AMD64. This leads to failed builds on ARM-based Macs. This PR switched target platform from static value to dynamic system var.

This addresses the following warning message when running:

 1 warning found (use docker --debug to expand):
 - FromPlatformFlagConstDisallowed: FROM --platform flag should not use constant value "linux/amd64" (line 1)

[Copilot]

Pull request overview

This PR aims to make the Dockerfile platform-agnostic by replacing the hardcoded linux/amd64 platform with a dynamic system variable. The change addresses build warnings and compatibility issues on ARM-based Macs.

Changes:

• Updated FROM statement to use $BUILDPLATFORM instead of hardcoded linux/amd64

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[Copilot]

Using BUILDPLATFORM here will build the image for the host platform (where the build is running), but this may not be the desired behavior. BUILDPLATFORM is typically used for build tools in multi-stage builds. For the final runtime image, you should use TARGETPLATFORM instead, which represents the platform you're building for. Alternatively, removing the --platform flag entirely will allow Docker to automatically use the appropriate platform.

Suggested change

	FROM --platform=$BUILDPLATFORM python:3.12-slim
	FROM --platform=$TARGETPLATFORM python:3.12-slim