fix(nx-serverless): set serviceDir earlier in the deploy process

[tstackhouse]

Details: Sets serviceDir properly during init step for deploy commands, this fixes an issue when using a single zip artifact for deploy.

Breaking Changes: This may affect the recently added function based deploys

Fixes/Feature #82

• yarn affected:test succeeds
• yarn affected:e2e succeeds
• yarn format:check succeeds
• Code coverage does not decrease (if any source code was changed)
• If applicable, appropriate Wiki docs were updated (if applicable)
• If applicable, code review comments are written in the source code with / {Name}