Unable to run dry-run

[T0MASD]

Hi, thanks for working on the chart! I'm running into some issues trying it out.
First fairly simple:

Error: parse error in "drone/templates/deployment-agent.yaml": template: drone/templates/deployment-agent.yaml:59: unexpected "}" in operand

After fixing that, I ran it again:

$ helm install --dry-run --debug .
[debug] Created tunnel using local port: '38347'

[debug] SERVER: "127.0.0.1:38347"

[debug] Original chart version: ""
[debug] CHART PATH: /home/tomas/helm-charts-drone

Error: render error in "drone/templates/role.yaml": template: drone/templates/role.yaml:6:23: executing "drone/templates/role.yaml" at <.Values.kubernetes.namespace>: na
mespace is not a method but has arguments

I have tried replacing .Values.kubernetes.namespace . with .Values.kubernetes.namespace but then other issue appeared:

$ helm install --dry-run --debug .
[debug] Created tunnel using local port: '37603'

[debug] SERVER: "127.0.0.1:37603"

[debug] Original chart version: ""
[debug] CHART PATH: /home/tomas/helm-charts-drone

Error: render error in "drone/templates/deployment-agent.yaml": template: drone/templates/deployment-agent.yaml:18:22: executing "drone/templates/deployment-agent.yaml" 
at <.Values.agent.replicas>: nil pointer evaluating interface {}.replicas

Should I be passing in some values?

Here's my helm version

$ helm version
Client: &version.Version{SemVer:"v2.15.0", GitCommit:"c2440264ca6c078a06e088a838b0476d2fc14750", GitTreeState:"clean"}
Server: &version.Version{SemVer:"v2.15.0", GitCommit:"c2440264ca6c078a06e088a838b0476d2fc14750", GitTreeState:"clean"}